ErÂ…no, read up the thread again. A "kinda looks almost right" spring from a hardware store will not work. You need the correct spring or the carburetor won't work right.
Go through the Walker catalogue for Carter 2bbl carb parts and you'll find the idle needle and possibly the step-up piston spring (though the latter is a long shot). Yours is a "BBD 1¼" solid-fuel divorced choke" model.